Method subtract

src/Set.js:134–150

(...iters)

  }

  subtract(...iters) {
    if (iters.length === 0) {
      return this;
    }
    iters = iters.map((iter) => SetCollection(iter));
    const toRemove = [];
    this.forEach((value) => {
      if (iters.some((iter) => iter.includes(value))) {
        toRemove.push(value);
      }
    });
    return this.withMutations((set) => {
      toRemove.forEach((value) => {
        set.remove(value);
      });
    });
  }

  sort(comparator) {
    // Late binding